Scientists on Monday reported new evidence that copper can contribute to the plaque buildup in the brain that causes Alzheimer’s disease. That has fueled a new debate over the mineral’s role in elderly dementia.

But the scientific community is divided on the question of whether copper found in red meat, vegetables, and dairy products as well as plumbing to provide drinking water in much of the developed world – causes or prevents Alzheimer’s disease.

Read more in the Los Angeles Times